This specification establishes the materials and performance requirements for flexible, pre-insulated piping intended for hot and chilled water applications. Piping system may include one or more carrier pipes within a common outer jacket and shall be supplied in coil form. Carrier-pipe, thermal-insulation, and protective-jacket material shall be continuous and uniform throughout the coil while connections and joints in the carrier pipe and the protective jacket shall not be allowed within the coil. The pipe assembly shall be subjected to end seal and bending force tests for water infiltration inspection and to ensure the flexibility of the piping system, respectively.

1.1 This specification covers flexible, pre-insulated plastic piping systems commonly used to convey hot and cold fluids, including piping systems that are supplied complete with plastic carrier pipe, thermal insulation, and outer jacket manufactured as an integrated system, and are supplied in a coil or as a straight length. Both bonded and non-bonded insulation types are included. Included are requirements and test methods for material, workmanship, dimensions, and endseal testing. Requirements for markings are also given. The components covered by this specification are intended for use in, but not limited to, residential and commercial, hot- and cold-potable water distribution systems, reclaimed water, fire protection, municipal water service lines, building supply lines, radiant heating and cooling systems, hydronic distribution systems, snow and ice melting systems, geothermal ground loops, district heating, turf conditioning, compressed air distribution and building services pipe, provided that the carrier pipe or tubing covered herein complies with applicable code requirements.

Note 1: Piping covered by this specification is not recommended for use in indoor flammable gas applications.

1.2 Piping systems may include one or more carrier pipes within a common outer jacket.

1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered part of this standard.

Note 2: Pre-insulated pipes covered by this specification are typically installed underground in buried applications.

1.4 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5 The following safety hazards caveat pertains to the test methods portion, Section 7, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.